The Benman LM33 magnetic spirit level has 3 acrylic vials, with a patented mirror vial for reading the level when it is positioned vertically against a wall. Its accuracy is 0.5 mm/m (0.029°), and it measures horizontally and vertically. The natural magnets and rubber grips keep it steady against the wall.

It is made of 2 mm-thick aluminum, with a metallic...